134431031 has 4 divisors (see below), whose sum is σ = 153635472. Its totient is φ = 115226592.

The previous prime is 134431013. The next prime is 134431043. The reversal of 134431031 is 130134431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134431031 is a prime.

It is a super-2 number, since 2×134431031² = 36143404191445922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134430994 and 134431012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134431001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9602210 + ... + 9602223.

It is an arithmetic number, because the mean of its divisors is an integer number (38408868).

Almost surely, 2^134431031 is an apocalyptic number.

134431031 is a deficient number, since it is larger than the sum of its proper divisors (19204441).

134431031 is an equidigital number, since it uses as much as digits as its factorization.

134431031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19204440.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 134431031 is about 11594.4396587330. The cubic root of 134431031 is about 512.2710852353.

Adding to 134431031 its reverse (130134431), we get a palindrome (264565462).

The spelling of 134431031 in words is "one hundred thirty-four million, four hundred thirty-one thousand, thirty-one".